willnue added the ability to tweet to his GE Wireless Control Center Alarm system. He added an Arduino with Ethernet Shield and uses the ThingTweet app to connect the alarm to Twitter. Check out his detailed Instructables to learn more, build your own social thing, and enter the contest.

wilnue says,

This project will add tweeting capabilities to the GE 45142 Choice-Alert Wireless Control Center Alarm system. The alarm system allows you to connect up to 16 different sensors across 4 zones and with the addition of the Arduino powered AlarmingTweet you can enable it to keep you informed of its status anytime anywhere.